Guiding device for sewing machines



O. E. ROHN.

GUIDING DEVICE FOR SEWING MACHINES.

APPLICATION FILED OCT- 8, 1911.

1A35fi61 Patented Nov. 141, 1922.

6 SHEETS-SHEEI I.

0. E. ROHN.

GUIDING DEVICE FOR SEWING MACHINES.

APPLICATION FILED OCT: 8,1917.

lfifififil Patented Nov. M, 1922.,

6 SHEETSSHEE'I 2- 0. E. ROHN. GUIDING DEVICE FOR SEWING MACHINES.

APPLICATION FILED OCT. B, 1917.

Patented Nov. 14, 1922.

6 SHEETSSHEE'I 3.

Snow W01 (Rio Lama S 0. E. ROHN.

GUIDING DEVICE FOR SEWING MACHINES.

APPLICATION FILED OCT- 51 1917. 1A3561 Patented Nov. M, 1922.

6 SHEETSSHEEI 4.

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APPLICATION FILED OCT- 8. 1917- 2 95 11 MM. v .F. &6 m m P O. E. ROHN.

GUIDING DEVICE FOR SEWING MACHINES.

APPLICATION FILED OCT- 8, I917.

Patented Nov M, 1922,.

6 SHEETS-SHEEI 6.

Patented Nov. 14, 11922..

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OSCAR E. ROHN, OF CHICAGO, ILLINOIS, ASSIGNOR T0 UNION SPECIAL MACHINE L COMPANY, OF CHICAGO, ILLINOIS.

GUIDING DEVICE FOR SEWING MACHINES.

Application filed October 8, 1917. Serial No. 195,353.

To (1. whom it may concern:

Be it known that I, OSCAR E. RoHN, a citizen of the United States, residing at Chicago, in the county of Cook, State of Illinois, have invented certain new and useful Improvements in Guiding Devices for Sewing Machines, of which the following is a description, reference being had to the accompanying drawing, and to the figures of reference marked thereon.

The invention relates to new and useful improvements in guiding devices for sewing machines and more particularly to guiding devices for directing fabric sections to a multiple stitching mechanism.

An object of the invention is to provide a sewing machine with guiding devices for directing the edges of fabric sections in spaced relation to each other, and with a guiding device for directing a strip so that the same may be joined by the stitching mechanism to the respective fabric sections.

A further object of the invention is to provide a sewing machine having guiding de vices of the above character wherein said guiding devices are so constructed as to fold the edges of the fabric sections prior to the joining of the same to the strip.

A still further object of the invention is to provide a sewing machine having guiding devices of the above character wherein the strip guiding device is also so constructed as to fold the edges of the strip prior to the securing of the same to the folded edges of the" fabric sections.

These and other objects will in part be obvious and will in part be hereinafter more fully disclosed.

In the drawings which show by way of illustration one embodiment of the inven tion;

Fig. 1 is a sectional view transversely through a portion of a sewing machine having my improved guiding devices attached thereto the section being parallel with the line of feed and through one of the needle openings.

Fig. 2 is a front view of a portion of a machine having my improved guiding devices applied thereto.

Fig. 3 is an end view of the same.

Fig. 4 is a sectional view on the line 44 of Fig. 6.

Fig. 5 is a plan view of the work support the feed dogs and the guiding devices.

%The invention consists broadly in a guiding device applied to a sewing machine having spaced stitch forming devices for producing independent lines of stitching. In front of the needle of one of the stitch forming devices is a guide or folder which receives the edge of one of the fabric sections and inturns said edge and directs it to the needle with which said guide or folder is associated. In front of the needle of the other stitch forming device is another guide or folder which receives the edge of the other fabric section and infolds the same and direct-s said infolded edge to the needle with which said guide or folder is associated. A strip-guide is disposed relative to the said guides or folders soas to direct a strip of material whereby its opposite edges are pre sented to the respective needles so that the edges of the fabric sections are joined to the strip. This strip guide is preferably so constructed as to inturn the edges of the strip and also to interfold said inturned edges of the strip with the inturned edges respectively of the fabric sections.

Referring more in detail to the drawings my invention is shown as applied to a sewing machine having a. work support 1 and an over hanging arm 2. Mounted in the over hanging arm is a needle bar 3' having a needle head 4 at its lower end. The needle bar is reciprocated by a lever 5 which is connected to the needle bar by a link 6.

Mounted on the needle head t are two pairs of needles 7 and 8. As clearly shown in Fi 7 there is a looper 9 associated with eac needle of the pair of needles 7 and a looper 10 associated with each needle of the pair of needles 8. In other words the stitch forming mechanism produces four independent lines of stitching. The pairs of needles as Clearly shown in the drawings are widely spaced, The material is held on the Work is a sectional view through the presssupport by a dpresser foot 11. This presser mounted in the overhangin a presser bar 12 which is arm 2. The material is fed underneath t e presser foot by a feed dog 13 which is formed with a plurality of feeding sections so as to feed the material to the needles and away from the same after they are stitched and also feed a strip which passes between the pairs of needles and which is also stitched by the needles. This multiple needle stitch forming mechanism forms no art per se of the present invention and urther detail description thereof is not thought necessary.

Located in front of the pair of needles 7 is a guide or folder 14. Located in front of the pair of needles 8 is a guide or folder 15. These folders 14 and 15 are adapted to receive respectively two fabric sections F and F. While of course the guides or folders 1 1 and 15 may be used for guiding fabric sections having selvage edges they are preferably constructed for guiding and infolding the respective edges of the fabric sections. To this end each folder has a guiding recess 16 which is so shaped between the re ceiving and delivering ends of the folder or guide as to info-ld the edge of the fabric section. Of course it will be understood that these guides or folders 14 and 15 are right and left hand folders so that the fabric sections may be spaced and have their opposed edges inturned or info-lded. Each guide or folder is provided with a supporting shank 17 and this shank is adjustably secured to the work support by screws 18.

Associated with the guides or folders 14: and 15 is a strip guide 19. Thisstrip guide is formed with a guiding recess 20. This iding recess between the receiving and deivering ends of the strip guide is so shaped as to inturn or infold the opposite side edges of the strip. The strip guide extends underneath the main portions of the guides or folders 14 and 15 and is so positioned relative to the delivery end of said'guides or folders that the inturned edges of the strips will be interfolded with the respective inturned edges of the fabric sections. In Fig. 8 of the drawings 1 have shown diagrammatically the strip at S. The inturned edges of the strip are indicated at s and s. The inturned edge of the fabric section F is indicated at 7 while the inturned edge of the foot is carrie fabric section F is indicated at f. It will be noted that these inturned edges are interfolded as above stated. The interfolded edges of the strip and the fabric sections are directed to the, pairs of needles so that the two lines of stitching produced by the needles 7 passes through one of the interfolded parts while the two lines of stitching produced, by the needles 8 willpam through the other interfolded parts. The lings of stitching are indicated in Fig. 8 of the drawings at n and n! The guides or folders 14 and 15 and the strip guide 19 are disposed directly in front of the presser foot 11 so that the strip and fabric sections will be directed underneath the presser foot and to the stitchin needles. r

y invention is particularly useful in inserting an elastic web between fabric sections for joining the same. The elastic web is of course the strip S and this strip is led through the strip guide 19. The edges of the elastic web will be interfolded with the folded edges of the fabric sections and firmly united thereto by the lines of stitching.

It will be noted that the guide for the strip is disposed in a plane below the plane of the edge guides. Therefore, the strip may be readily rolled into a spool and mounted below the cloth plate and the strip will be automatically unwound from this spool by the pull of the feed of the sewing machine. This automatic feeding of the strip leaves the operators hands free for guiding the respective fabric sections.

Havin thus fully described the invention, what I c aim as new and desire to protect by Letters Patent is:

The combination offeeding mechanism,

stitching mechanism including two pairs of laterally spaced needles arranged in a line at right angles to the line of feed, complemental stitch forming devices co-operating with said needles, adjustable s aced guides disposed in advance of the needl s and operating respectively to guide and inturn the edges of two separate fabric sections, and direct said inturned edges tothe respective pairs of needles, and a strip guide provided with a guiding recess constructed and disposed relative to the spaced guides for the fabric sections so as to guide a strip, inturn the opposite edges thereof and interfold said side edges of the strip with the inturned edges of the respective fabric sections and direct said interfolded edges to the respective needles, whereby said interfolded edges are stitched together and the fabric sections joined by said strip.

In testimony whereof, I affix my signature.

OSCAR E, ROHN. 

